*{
	margin: 0;
	padding: 0;
	text-decoration: none;
	list-style: none;
}
body{
	overflow: hidden;
}
.content_box{
	width: 100%;
	height: 1000px;
	position: relative;
	
}
.jump{
	width: 100%;
	height: 100%;
	text-align: center;
	position: absolute;
	top: 0;
	left: 0;
	color: black;
	font-size: 50px;
	font-family: cursive;
}
.jump_1{	
	background-color: skyblue;
}
.jump_2{
	background-color: red;
	display: none;
}

.jump_3{
	
	background-color: yellow;
	display: none;
}

.text2{
	line-height: 500px;
}
.text3{
	line-height: 800px;
}